EP1645400A1 - Procédé de démarrage et d'arrêtage d'un dispositif de thermoformage avec un poste de chauffage - Google Patents

Procédé de démarrage et d'arrêtage d'un dispositif de thermoformage avec un poste de chauffage Download PDF

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Publication number
EP1645400A1
EP1645400A1 EP05014401A EP05014401A EP1645400A1 EP 1645400 A1 EP1645400 A1 EP 1645400A1 EP 05014401 A EP05014401 A EP 05014401A EP 05014401 A EP05014401 A EP 05014401A EP 1645400 A1 EP1645400 A1 EP 1645400A1
Authority
EP
European Patent Office
Prior art keywords
heating station
shielding plate
heating
thermoforming machine
forming film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05014401A
Other languages
German (de)
English (en)
Other versions
EP1645400B1 (fr
Inventor
Jürgen Matzenmüller
Wolfgang Grube
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uhlmann Pac Systeme GmbH and Co KG
Original Assignee
Uhlmann Pac Systeme GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uhlmann Pac Systeme GmbH and Co KG filed Critical Uhlmann Pac Systeme GmbH and Co KG
Publication of EP1645400A1 publication Critical patent/EP1645400A1/fr
Application granted granted Critical
Publication of EP1645400B1 publication Critical patent/EP1645400B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method

Definitions

  • the invention relates to a method for starting in particular a continuous thermoforming machine with a heating station, in which a shielding plate between the heat source and the forming film is adjusted at a standstill, determines the residence time of the forming film in normal operation at a constant feed rate in the heating station and the acceleration of the Forming film is determined from standstill until reaching the constant feed rate, and in which the acceleration profile of opposite to the feed direction of the forming film removed from the heating station shielding plate is determined so that the local no longer shaded by the shielding plate Form foil areas are promoted in the heating station in a transfer time corresponding to the residence time of the front in the conveying direction edge of the shielding plate to the end of the heating station.
  • the invention further relates to a method for stopping the thermoforming machine.
  • Thermoforming machines are known from the prior art, are supplied with the forming films of a forming station, which serves to form wells in the film, which are subsequently filled in a filling station, sealed in a sealing station with a sealing film.
  • the forming station is usually preceded by a heating station, in which the forming film is heated to the temperature required for the formation of the wells in the forming station.
  • the heating can be done contact by means of hot plates or contactless by spaced from the mold film in the heating station heating elements whose heating effect can be stopped by an insertable between the heating elements and the mold film shielding.
  • thermoforming machine which operates in cycles, so that the mold film is heated in sections in the heating station and this section is transferred in the next cycle for further processing in the forming station.
  • the starting and stopping of the cyclically operated thermoforming machine is characterized in that in the change of the feed of the molding foil preceding clock the shield plate is removed from the heating station or introduced into the heating station, so that in particular when starting the thermoforming machine, the Formfolien Schemee in the Heating station heated for one tact and can be processed in the usual way in the forming station.
  • DE 198 50 143 A1 discloses a device for connecting two bodies, namely a pressure-sensitive adhesive layer on a sealing profile. The two bodies are heated to this with NIR lamps, the heating is subsequently controlled by pyrometer.
  • DE 198 50 143 A1 also discloses the indication that the NIR radiation can be started or stopped within fractions of a second by using diaphragms, but this document contains no indication, as in continuously advanced bodies to prevent waste proper heating and Achieving the processing temperature even longer extended areas when starting the device ensured can be.
  • the invention is therefore based on the object of specifying a method for starting a thermoforming machine can be reduced with the waste of thermoforming film or even completely avoided. It is also an object to provide a method for stopping a thermoforming machine by which initial conditions defined for subsequent starting can be provided.
  • the starting part of the problem is solved by the method mentioned, which is characterized by the advantages that when starting the feed of the thermoforming machine in the forming film, a temperature jump is generated at the front in the feed direction, downstream edge of the heating station, so that the entire mold film area lying in the heating station reaches the film temperature required for further processing. There is a minimization of the film waste before lying on the between the end of the heating station and the beginning of the molding station areas and the further production after a stop of the thermoforming machine can be resumed faster. At a start of the thermoforming machine is ensured for the present in the heating station Formfolienabitese that they can be heated by the heat source the full residence time in the heating station and so safely reach the processing temperature.
  • thermoforming machine when starting the thermoforming machine, the beginning of the adjustment of the shielding plate by a dwell time before the beginning of the Feed of the thermoforming film is because so the heating, in particular the placed at the downstream end of the heating station molded film sections is guaranteed regardless of the extent of the heating station.
  • a plurality of adjacent in the conveying direction of the forming film NIR radiators are used as heat sources, which cause the heating of the thermoforming foil contactless substantially by thermal radiation. It is furthermore provided that the heat output of the NIR radiators is reduced when the thermoforming machine is at a standstill so as to avoid heating up the shielding plate or to save a complex cooling device for the shielding plate.
  • the heat output of the NIR radiator is increased so early when starting the thermoforming machine, that at the beginning of the feed of the mold film, the heating power of the continuous operation is reached. It is even more advantageous if the heat output of the NIR radiator is increased so early on starting the thermoforming machine that at the beginning of the adjustment of the shielding plate, the heating power of continuous operation is reached, as there is already a constant heating power of the NIR radiator, when the shield plate is moved against the feed direction of the thermoforming film from the heating station and not because of a reduced heating power, the transfer time must be increased in order to introduce the required amount of heat in the mold film.
  • the process step is provided that measured at least at the start of the thermoforming machine by means of a heating station downstream temperature sensor, the temperature of the thermoforming film and used as a controlled variable in a control loop for the residence time of the thermoforming film in the heating station or degree of heating becomes.
  • a pyrometer is used as the temperature sensor for non-contact measurement of the temperature.
  • the stopping part of the object is achieved by a method for stopping, in particular, a continuously operating thermoforming machine with a heating station, in which a shielding plate between the heat source and the forming film is adjusted for standstill in the conveying direction of the forming film, wherein the front edge in the conveying direction the shielding plate is synchronized with the mold film area coming to rest at the end of the heating station and moved and braked in synchrony by the heating station.
  • This method ensures that when the thermoforming machine is at a standstill, all the already heated mold film can be processed and the mold film is only decelerated when the last molded film section to be passed has left the heating station.
  • the front edge of the shielding plate in the conveying direction is exactly to the line of the forming film synchronized, which later forms the end of the forming film section in the heating station.
  • the deceleration of the molding film is started only when the last heated and to be processed forming film section has left the heating station, so that the heated in the heating station Formfolienabête can be processed without modification of the usual procedure.
  • heating station 1 is schematically shown, having a housing 2, in which above a in the direction of arrow 3, the heating station 1 continuous forming film 4, a plurality of NIR radiator 5 as heat sources 6 are arranged. On the opposite side of the mold film 4 of the heat sources 6, a counter-reflector 7 is arranged stationary.
  • a Shield plate 8 arranged adjustable, which can be adjusted against the feed direction 3 of the forming film 4 from the heating station 1 by means of a regulated drive.
  • Fig. 1 shows the state of the heating station 1 during a standstill of the thermoforming machine, in which the mold film 4 is protected by the shield plate 8 against heating by the heat sources 6, to which additionally the heating power of the NIR radiator 5 is reduced.
  • Fig. 3 shows a snapshot of the state of the heating station 1 during normal operation, in which the mold film 4 is advanced continuously at a constant feed rate, so that an arbitrary Formfolien Scheme for resulting from the length of the heating station 1 and the constant feed rate dwell time in the heating station remains and during the dwell time D is supplied by the constant heat output working NIR radiator 5, the amount of heat required to heat the Formfolien Scheme from the initial temperature when entering the heating station 1 to the required for further processing mold temperature.
  • the acceleration profile of the mold film 4 is determined from standstill until reaching the constant feed rate.
  • the acceleration profile of the opposite of the feed direction of the forming film 4 removed from the heating station 1 shielding 8 is determined so that the local no longer from the shielding. 8 shaded mold film areas in the heating station 1 in a transfer time corresponding to the dwell time D from the front in the conveying direction edge 9 of the shielding plate 8 is conveyed to the end of the heating station 1.
  • the required transfer time can be easily provided by starting the adjustment of the shielding plate 8 by a dwell time D before starting the feeding of the forming film 4 when starting the thermoforming machine.
  • the heating power of the NIR radiator 5 is again raised to the normal value before the start of the feed of the mold film 4 and that expediently so early that at the beginning of the adjustment of the shielding plate 8, the heating power of the continuous operation is reached, ie not in the transfer time more of the shielding plate 8 shaded mold film sections, the full, constant heating power is available and thus there is no variation in the amount of heat supplied during the transfer time.
  • the theoretically determined acceleration profile of the shielding plate 8 is controlled by means of a downstream of the heating station 1 temperature sensor, namely a pyrometer 11, with which the temperature of the mold film 4 is measured and used as a controlled variable in a control loop for the residence time of the mold film 4 in the heating station 1.
  • FIG. 6 shows the path traveled by the forming film 4 as a function of time and the resulting position of the shielding plate 8.
  • the dwell time D is moved to the right on the time axis and the vertical distance to the film starting curve is determined after the dwell time D. This distance corresponds to the opening of the shielding plate 8 at time T, so that the movement of the shielding plate 8 can be derived from the acceleration curve of the forming film 4 theoretically.
  • the braking of the mold film 4 takes place only when the last heated and processed molded film section has left the heating station 1, wherein further in the conveying direction front edge 9 of the shield plate 8 with the at the end the heating station 1 coming to rest form film section synchronized and synchronized by the heating station 1 is moved and braked in the heating station 1. Since for normal operation is only required that the shield plate 8 is completely adjusted from the heating station 1, but the position of the shield 8 outside the heating station 1 in normal operation is arbitrary, there is also the possibility of the shield 8 outside the heating station 1 with the forming film section to synchronize and the shield plate 8 already synchronized with the Formfolienabites enter and slow down in the heating station 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP05014401A 2004-10-09 2005-07-02 Procédé de démarrage et d'arrêtage d'un dispositif de thermoformage avec un poste de chauffage Not-in-force EP1645400B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004049267A DE102004049267B9 (de) 2004-10-09 2004-10-09 Verfahren zum Starten insbesondere einer kontinuierlich arbeitenden Thermoformmaschine mit einer Heizstation sowie Verfahren zum Stoppen einer kontinuierlich arbeitenden Thermoformmaschine

Publications (2)

Publication Number Publication Date
EP1645400A1 true EP1645400A1 (fr) 2006-04-12
EP1645400B1 EP1645400B1 (fr) 2007-09-26

Family

ID=35698039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05014401A Not-in-force EP1645400B1 (fr) 2004-10-09 2005-07-02 Procédé de démarrage et d'arrêtage d'un dispositif de thermoformage avec un poste de chauffage

Country Status (6)

Country Link
US (1) US7636992B2 (fr)
EP (1) EP1645400B1 (fr)
JP (1) JP2006111011A (fr)
AT (1) ATE374100T1 (fr)
DE (2) DE102004049267B9 (fr)
SG (1) SG121958A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2026628A1 (fr) 2007-08-14 2009-02-18 UHLMANN PAC-SYSTEME GmbH & Co. KG Dispositif destiné au réchauffement d'une feuille
WO2014183934A1 (fr) * 2013-05-13 2014-11-20 Trumpf Gmbh + Co. Kg Dispositif de formage, machine d'usinage et procédé de thermoformage d'une pièce pouvant être déformée de manière thermoplastique
CN105665516A (zh) * 2016-04-14 2016-06-15 河南金阳铝业有限公司 一种铝箔起皱机用底托

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022263B4 (de) * 2006-05-11 2008-04-03 Uhlmann Pac-Systeme Gmbh & Co. Kg Heizstation
DE102006040802A1 (de) * 2006-08-31 2008-03-20 Emil Pester Gmbh Heizstation in einer Tiefziehmaschine
DE102006054400A1 (de) * 2006-11-18 2008-05-21 Uhlmann Pac-Systeme Gmbh & Co. Kg Thermoformmaschine
JP5937524B2 (ja) * 2013-02-01 2016-06-22 アイシン高丘株式会社 赤外炉、赤外線加熱方法およびそれを用いて製造された鋼板
US10913198B2 (en) 2017-10-19 2021-02-09 The Boeing Company Pyrometer control for hot drape formers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1145784B (de) * 1957-06-29 1963-03-21 Jacques Gaspard Honore Ollier Maschine zur automatischen Herstellung von wahlweise leeren oder gefuellten Verpackungen und aehnlichen Gegenstaenden
DE2745422A1 (de) 1977-10-08 1979-04-19 Applic Plastique Mec Elec Verfahren zum ingangsetzen und stillsetzen einer thermoformmaschine und vorrichtung zur durchfuehrung des verfahrens
US4883419A (en) * 1985-09-11 1989-11-28 Joel Queirel Device for thermoforming parts from synthetic material
DE19850143A1 (de) 1998-10-30 2000-05-11 Industrieservis Ges Fuer Innov Laminierung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3234506C2 (de) * 1982-09-17 1985-06-05 Thies 5253 Lindlar Eggers Verfahren zum Inbetriebnehmen einer Tiefzieh- und Abfüllmaschine
US5647923A (en) * 1995-07-13 1997-07-15 Teledyne Industries, Inc. Method for producing refractory metal foil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1145784B (de) * 1957-06-29 1963-03-21 Jacques Gaspard Honore Ollier Maschine zur automatischen Herstellung von wahlweise leeren oder gefuellten Verpackungen und aehnlichen Gegenstaenden
DE2745422A1 (de) 1977-10-08 1979-04-19 Applic Plastique Mec Elec Verfahren zum ingangsetzen und stillsetzen einer thermoformmaschine und vorrichtung zur durchfuehrung des verfahrens
US4209957A (en) * 1977-10-08 1980-07-01 Ste d'Application Plastique, Mecanique et Electronique Plastique-Mecaniqu e Arrangement and process for activating and arresting the operation of a heat-forming machine
US4883419A (en) * 1985-09-11 1989-11-28 Joel Queirel Device for thermoforming parts from synthetic material
DE19850143A1 (de) 1998-10-30 2000-05-11 Industrieservis Ges Fuer Innov Laminierung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2026628A1 (fr) 2007-08-14 2009-02-18 UHLMANN PAC-SYSTEME GmbH & Co. KG Dispositif destiné au réchauffement d'une feuille
WO2014183934A1 (fr) * 2013-05-13 2014-11-20 Trumpf Gmbh + Co. Kg Dispositif de formage, machine d'usinage et procédé de thermoformage d'une pièce pouvant être déformée de manière thermoplastique
CN105665516A (zh) * 2016-04-14 2016-06-15 河南金阳铝业有限公司 一种铝箔起皱机用底托

Also Published As

Publication number Publication date
DE102004049267B4 (de) 2006-09-21
US7636992B2 (en) 2009-12-29
DE502005001560D1 (de) 2007-11-08
DE102004049267B9 (de) 2007-05-16
ATE374100T1 (de) 2007-10-15
SG121958A1 (en) 2006-05-26
DE102004049267A1 (de) 2006-04-13
US20060076701A1 (en) 2006-04-13
EP1645400B1 (fr) 2007-09-26
JP2006111011A (ja) 2006-04-27

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